books.google.co.uk - The structures discovered on the Brecon Forest Tramroads illustrate the beginnings of modern railway practice. This first detailed archaeological study of a railway illuminates parallels located elsewhere in Britain. Developments that were to be of world importance. Did iron railway bridges exist before...http://books.google.co.uk/books/about/The_Archaeology_of_an_Early_Railway_Syst.html?id=C-pzUWrCU5sC&utm_source=gb-gplus-shareThe Archaeology of an Early Railway System